How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Low-Pressure Stainless Steel Threaded Pipe Flanges
Also known as Pressure Class 150 flanges, these are designed for low-pressure pipe applications. Bolt two flat-surface flanges or two raised-surface flanges of the same size together with a gasket (sold separately) to create an access point within a line.
304 stainless steel flanges have very good corrosion resistance. 316 stainless steel flanges have excellent corrosion resistance.
Forged flanges have better strength than cast flanges. They are also called ANSI flanges.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met:
Alloy 20 flanges: ASME B16.5
All other flanges: ASME B16.5, ASTM A182 - Fittings: Use Class 150 stainless steel
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
Saddle tap tees tap into existing pipe lines so you can install branch lines, valves, and other equipment. The gasket and clamps create a tight seal so the opening won’t leak. To install, shut down your line and secure the clamps, then drill a hole into the pipe.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water
- Temperature Range: -20° to 180° F
| Pipe Size (A)  | For Pipe Size | For Pipe OD | Lg. | Max. Pressure | Max. Vacuum | Color | Material | Gasket Material | Each | ||
NPT Female | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 8 | 8 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 0000000 |
| 3/4 | 8 | 8 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
| 1 | 8 | 8 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
| 1 1/4 | 8 | 8 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
| 1 1/2 | 8 | 8 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
| 2 | 8 | 8 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
Low-Pressure Steel Threaded Pipe Flanges
Use these flanges for low-pressure applications in noncorrosive environments. Bolt two flanges of the same size together with a gasket (sold separately) to create an access point within a line.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met:
NPT: ASME B16.5, ASTM A105, MSS SP-25
BSPT: ASTM A105 - Fittings: Use Class 125 or 150 iron and steel
- Pipe Nipples and Pipe: Use Schedule 40 steel
Bolt Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT | ||||||||||
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | Steel | 000000000 | 0000000 |
FM-Approved Low-Pressure Cast Iron Threaded Pipe Flanges
Suitable for use in fire-protection applications, these flanges are brittle and can be quickly opened with the strike of a sledge hammer. Bolt two flanges of the same size together with a gasket (sold separately) to create an access point within a line. Use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met:
3/4 Pipe Size: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved
All other sizes: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved, UL Listed - Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Class 125 iron and steel
Bolt Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT | ||||||||||
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 0000000 |
Low-Pressure Galvanized Steel Threaded Pipe Flanges
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met: ASTM A123, ASTM A105, ASME B16.5
- Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
- Fittings: Use Class 125 or 150 galvanized iron and galvanized steel
The galvanized finish on these flanges provides fair corrosion resistance. Also known as Pressure Class 150 flanges, they are for use in low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line.
For technical drawings and 3-D models, click on a part number.
Bolt Hole | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Each | |
NPT | |||||||||
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 285 psi @ 72° F | 150 psi @ 300° F | 00000000 | 0000000 |
Low-Pressure Aluminum Threaded Pipe Flanges
Also known as Pressure Class 125 flanges, these are for use in low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are aluminum, which is lightweight with good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Water
- Pressure Class: 125
- Specifications Met:
Pipe Size 1-6: ASME B16.1 - Fittings: Use Class 150 aluminum
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
Bolt Hole | ||||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
NPT | ||||||||
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 0000000 |
Thick-Wall Plastic Pipe Fittings for Water
Connect these fittings to Schedule 80 pipe. With thicker, stronger walls than standard-wall fittings, they can handle heavy duty supply applications, such as water processing, wastewater treatment, and irrigation. Fittings are plastic for good corrosion resistance. They meet ASTM specifications and testing requirements for material quality.
Fittings for drinking water meet NSF/ANSI Standard 61.
Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a PVC primer and cement (also known as solvent weld).
To prevent leaks in threaded connections, apply a sealant to the male threads. For plastic threads, apply a non-hardening, plastic-compatible sealant sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections. Note: For fittings that are not rated for pressure, you can use the pressure rating of the plastic pipe as a reference. Threaded fittings are limited to 50% of the rated pressure of the pipe.
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
For technical drawings and 3-D models, click on a part number.
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
| Pipe Size | Socket Depth | Material | Color | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| 8 | 4" | PVC Plastic | Dark Gray | 00000000 | 0000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
Inline tees are also known as branch tees.
Thick-Wall Plastic Pipe Flanges for Water
- For Use With: Drinking Water, Water
- Pressure Class: 150
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Fittings: Use Schedule 80 PVC Plastic
Also known as Pressure Class 150 flanges, these flanges have thick, strong walls to handle heavy duty industrial plumbing and water supply applications, such as water processing, waste water treatment, and irrigation. They meet NSF/ANSI 61 for drinking water. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. All are PVC, which has good corrosion resistance. Some are also glass filled for extra durability. They meet ASTM D1784 specifications and testing requirements for material quality.
Warning: Never use plastic pipe flanges and pipe with compressed air or gas.
Sealants cannot be sold to Colorado, Connecticut, District of Columbia, Delaware, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, New Hampshire, New Jersey, Northern Virginia, New York, Ohio, Pennsylvania, Rhode Island, or Utah due to local VOC (Volatile Organic Compounds) regulations.
For technical drawings and 3-D models, click on a part number.
To prevent leaks in threaded connections, apply a sealant to the male threads. For plastic threads, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections.
To prevent leaks in threaded connections, apply a sealant to the male threads. For plastic threads, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections.
Rotating flanges are also known as Van Stone flanges; they swivel for easy bolt hole alignment.
Standard-Wall Plastic Pipe Fittings for Water
Connect these fittings to Schedule 40 plastic pipe–they are the industry standard for residential and commercial low-pressure plumbing and water supply applications. They are plastic for good corrosion resistance.
Fittings for drinking water meet NSF/ANSI Standard 61.
Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a PVC primer and cement (also known as solvent weld).
To prevent leaks in threaded connections, apply a sealant to the male threads. Threaded connections can be taken apart as needed for maintenance and repair. For plastic threads, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections. Fittings that meet ASTM D1784, ASTM D1785, and ASTM D4066 adhere to specifications and testing requirements for material quality.
Note: For fittings that are not rated for pressure, you can use the pressure rating of the plastic pipe as a reference. Threaded fittings are limited to 50% of the rated pressure of the pipe.
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
For technical drawings and 3-D models, click on a part number.
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
| Pipe Size | Socket Depth | Material | Color | Max. Pressure | Specifications Met | Each | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 8 | 4 1/2" | PVC Plastic | White | Not Rated | ASTM D1784, NSF/ANSI 61 | 00000000 | 000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
| Pipe Size | Socket Depth | Material | Color | Max. Pressure | Specifications Met | Each | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 8 | 4 1/2" | PVC Plastic | White | Not Rated | ASTM D1784, NSF/ANSI 61 | 00000000 | 000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
(A) | |||||||
|---|---|---|---|---|---|---|---|
| Pipe Size | Socket Depth | Pipe Size (B) | Material | Color | Specifications Met | Each | |
NPT Threads | |||||||
| 8 | 4" | 6 | PVC Plastic | White | ASTM D1784, ASTM D1785, NSF/ANSI 61 | 00000000 | 0000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
| Pipe Size | Material | Color | Specifications Met | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| 8 | PVC Plastic | White | ASTM D1784, ASTM D1785, NSF/ANSI 61 | 00000000 | 0000000 |
Easy-Fit Barbed Hose Fittings for Air and Water
Low-profile barbs and a longer first barb allow for a smoother, easier installation than other barbed fittings. Slide the barbed end into rubber hose and secure with a clamp.
Steel fittings are stronger and more durable than other metal fittings. They should be used in noncorrosive environments. Zinc-plated steel fittings have slightly better corrosion resistance than unplated steel fittings. Fittings with a threaded end are also known as hose nipples.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 125 psi @ 72° F, except For 5" to 8" Hose IDs: 100 psi @ 72° F
- Maximum Vacuum: For 1/2" to 4" Hose IDs: 26 in. of Hg @ 72° F
- Temperature Range: -20° to 200° F
- Attachment Type: Use Worm-Drive Clamps, Bolt Clamps or Band-and-Buckle Clamps
- Specifications Met: See table
Easy-Fit Barbed Hose Fittings for Chemicals
Low-profile barbs and a longer first barb allow for a smoother, easier installation than other barbed fittings. Slide the barbed end into rubber hose and secure with a clamp. Fittings are 316 stainless steel, which has excellent corrosion resistance to withstand a variety of chemicals.
Adapters are also known as hose nipples; they adapt a barbed end to a threaded end.
For technical drawings and 3-D models, click on a part number.
- For Use With: Acetone, Isopropyl Alcohol, Mineral Oil, Sodium Hydroxide
- Maximum Pressure: See table
- Maximum Vacuum: 26 in. of Hg @ 72° F
- Temperature Range: -20° to 200° F
- Attachment Type: Use Worm-Drive Clamps, Bolt Clamps or Band-and-Buckle Clamps
- Specifications Met: ASME B1.20.1, ASTM A312
| For Hose ID | Pipe Size | Body Shape | Max. Pressure | Each | |
316 Stainless Steel | |||||
|---|---|---|---|---|---|
| 8" | 8 | Round | 25 psi @ 72° F | 0000000 | 0000000 |
Metal Cam-and-Groove Hose Couplings for Chemicals and Petroleum
Made of metal, these couplings have better durability than plastic cam-and-groove couplings. A complete coupling consists of a plug and a socket (both sold separately) that allow you to quickly connect and disconnect medium-to large-diameter hose lines. To connect, insert the plug into the socket and press the levers down. The levers fit snugly into the groove on the plug’s body and force the plug against the gasket to form a tight seal. To disconnect, lift both levers and pull out the plug. Couplings are compatible with Andrews, Dixon, Ever-Tite, and PT cam-and-groove couplings.
Plugs with male threaded end are also known as F adapters.
Plugs with female threaded end are also known as A adapters.
Sockets with male threaded end are also known as B couplers.
Straight sockets with female threaded end are also known as D couplers.
Aluminum plugs and sockets are lighter in weight than 316 stainless steel plugs and sockets. They have good corrosion resistance.
Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.
Warning: Relieve all pressure before disconnecting the couplings. Do not use cam-and-groove couplings with compressed air or gas.
For technical drawings and 3-D models, click on a part number.
- For Use With: Citric Acid, Diesel Fuel, Gasoline, Hydraulic Fluid
- Temperature Range: -65° to 250° F
- Compatible With: Andrews Cam-and-Groove, Dixon Cam-and-Groove, Ever-Tite Cam-and-Groove, PT Coupling Cam-and-Groove
- Specifications Met: 6 Coupling Size and smaller: Fed. Spec. A-A-59326
| Coupling Size | Plug OD | Pipe Size | Max. Pressure | Each | |
Aluminum | |||||
|---|---|---|---|---|---|
| 8 | 8 7/8" | 8 | 50 psi @ 72° F | 000000000 | 0000000 |
- For Use With: Citric Acid, Diesel Fuel, Gasoline, Hydraulic Fluid
- Maximum Pressure: See table
- Temperature Range: -65° to 250° F
- Compatible With: Andrews Cam-and-Groove, Dixon Cam-and-Groove, Ever-Tite Cam-and-Groove, PT Coupling Cam-and-Groove
- Specifications Met: 6 Coupling Size and smaller: Fed. Spec. A-A-59326
| Coupling Size | Plug OD | Pipe Size | Max. Pressure | Each | |
Aluminum | |||||
|---|---|---|---|---|---|
| 8 | 8 7/8" | 8 | 50 psi @ 72° F | 000000000 | 0000000 |
- For Use With: Citric Acid, Diesel Fuel, Gasoline, Hydraulic Fluid
- Maximum Pressure: See table
- Temperature Range: -65° to 250° F
- Compatible With: Andrews Cam-and-Groove, Dixon Cam-and-Groove, Ever-Tite Cam-and-Groove, PT Coupling Cam-and-Groove
- Specifications Met: 6 Coupling Size and smaller: Fed. Spec. A-A-59326
- For Use With: Citric Acid, Diesel Fuel, Gasoline, Hydraulic Fluid
- Maximum Pressure: See table
- Temperature Range: -65° to 250° F
- Compatible With: Andrews Cam-and-Groove, Dixon Cam-and-Groove, Ever-Tite Cam-and-Groove, PT Coupling Cam-and-Groove
- Specifications Met: 6 Coupling Size and smaller: Fed. Spec. A-A-59326
Hose Unions for Chemicals and Petroleum
- For Use With: Citric Acid, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Oil
- Maximum Pressure: See table
Access your line without twisting the hose—these unions separate into three pieces. Also known as WECO couplings and hammer unions, they’re made of forged steel that’s tough enough to be tightened with the blow of a hammer. Use them with other connectors that have the same hammer union figure and pipe size.
Note: Pressure ratings are given for static (constant) pressure conditions with no instantaneous increases in pressure.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Gasket Material | Hammer Union Figure | Max. Pressure | Each | |
Steel | |||||
|---|---|---|---|---|---|
NPT Female | |||||
| 8 | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 0000000 |